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Physical and chemical properties of elements

作者:本站原创      发布日期:2015-01-29      

 

MOSI2 heating element is a kind of resistance heating element basically made of high pure Molybdenum Disilicide. In oxidizing atmosphere, a layer of compact quartz protective film is formed on the surface of MOSI2 heating element owing to the high-temperature combustion, which prevent MOSI2 from continuously oxidizing. In oxidizing atmosphere, its max temperature can reach 1800℃. It can be widely used in such applications as sintering and heat treatment of ceramics, magnet, glass, metallurgy, refractory, etc.

 

1.Physical   properties

 

Volume density

 Bend strength

Vickers-hardness

Porosity rate

Water absortion

Hot

extensibility

5.5g/cm³

15~25kg/cm²

(HV)570kg/mm²

7.4%

1.2%

4%

  

2.Chemical properties

In oxidizing atmosphere, a layer of compact quartz protective film is formed on the surface of MOSI2 heating element owing to the high-temperature combustion, which prevent MOSI2 from continuously oxidizing. When the element temperature is higher than 1700℃,the SIO2 protective film will be fused. In oxidizing atmosphere, when the element is continuously used, the protective film forms again. The element cannot be used for long time in 400-700℃, otherwise it will be powdered owing to the strong oxidizing action in low temperature.

 

3.The max temperature of elements in different atmosphere

 

 

Atmosphere

Max element temperature

1700

1800

NO2,CO2,O2,Air

1700

1800

He,Ar,Ne

1650

1750

SO2

1600

1750

CO,N2

1500

1600

Wet H2

1400

1500

Dry H2

1350

1450

 

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